The reaction of chloroalkyl(vinyl)silanes with N,N-dichloro sulfonamides

The reactions of N,N-dichloroarenesulfonamides with chloromethyl(dimethyl)vinylsilane or of N,N-dichlorotrifluoromethanesulfonamide with chloropropyl(dimethyl)vinylsilanegive the NH- and NCl-containing products of chlorosulfonamidation of the double bonds. In contrast, N,N-(dichloro)trifluoromethanesulfonamide reacts with chloromethyl(dimethyl)vinylsilane to afford 4-chloro-3,3-dimethyl1-[(trifluoroethyl) sulfonyl]-1,3-azasilolidine via intramolecular heterocyclization.